The Quadruple represents the four animals of the twelve zodiac signs: sheep, pig, monkey, and rat.

Sheep is a very docile animal in the Chinese zodiac. They are usually used by people to symbolize kindness, gentleness and friendship. In the Quadruple, the metaphor of the sheep represents a soft, graceful, and gentle musical style. This music style usually expresses a soft emotion and beautiful melody, making people feel comfortable and warm.

Pigs are a very cute animal in the Chinese zodiac. They are usually used by people to symbolize happiness, wealth and enjoyment. In the Quadruple, the metaphor of the pig represents a cheerful, relaxed, and pleasant musical style. This music style usually expresses a happy emotion and relaxing melody, making people feel happy and happy.

Monkey is a very witty animal in the Chinese zodiac. They are usually used by people to symbolize intelligence, wit and flexibility. In the Quadruple, the monkey metaphor represents a smart, lively, and light musical style. This music style usually exhibits an alert emotion and flexible melody, making people feel agile and lively.

Rat is a very sensitive animal in the zodiac. They are usually used by people to symbolize sensitivity, wit and flexibility. In the Quadruple, the metaphor of the rat represents a light, sharp, and light musical style. This music style usually displays a keen emotion and light melody, which makes people feel sharp and light.

Characteristics of the Quadruple:

1. The musical form of the Quadruplet is usually characterized by the repeated use of music or lyrics. This repetition can be exactly the same, or it can be with some subtle variations while maintaining the basic melody or rhythm. This change can be a change in pitch, intensity, playing method, etc., or it can be a difference in lyric content or emotional expression.

2. The musical form of quadruple tunes usually has a sense of layering and progression. In a quartet, each repetition is not a simple copy, but the beginning of a new level and stage. These layers and stages are often played or sung by different instruments or voices, creating a sense of three-dimensionality and depth.

3. The musical form of quadruple tunes usually has the function of expressing emotions and expressing themes. In a quartet, each repetition is a further elaboration and expression of a theme or emotion. These repetitions can be used to reinforce a theme or emotion, or they can be used to create an atmosphere or emotion.

4. The musical form of quadruple music usually has a certain degree of improvisation and freedom. In the quadruple tune, the performer or singer can freely play and adapt the tune or lyrics according to his or her own understanding and feelings. This improvisation and freedom make the musical form of the quartet more vivid, flexible and varied.